Personal Background Checks are a way for landlords to really reassure themselves that they are renting to a good tenant. It is important to run background checks on every renter that applies for housing. This weeds out the riff-raff, while keeping quality, honest people on the prospect list.
You may be wondering why landlords come down hard on criminals, but it's really quite simple. If someone was convicted of armed robbery, would you want them renting from you? Even if it was a charge from years ago, it doesn't mean they quit being shady, it means they haven't gotten caught again.
Landlords on the whole want to take care of their properties and minimize loss, so using a Background Check Service helps them along in that regard.